E-Detector Motion System

• The electron detector is connected to the QWAD using the custom made Flex-cable. The detector is placed inside the vacuum-can whereas the QWAD is placed outside using appropriate flanges used between the Flex-cable and the QWAD. The connection between e-detector and the QWAD (if the vacuum - can was transparent) can be depicted as in the attached picture.

• The electron detector vacuum - can has a motion mechanism to allow us to move the detector vertically in and out of the beam along with the ability to rotate the detector facing the beam. A schematic view of the assembly can be seen here.

• We are using a stepping motor for the vertical motion ( data sheet ) which is being controlled by a single axis IDC Controller (User Manual)

Current Controller Settings:

Current: 1.5A 

Resolution: 18000 

Inductance: 16 mH 

Direction: positive 

Distance Unit: inch 

Acceleration Unit: in/s^2